The 24-year-old singer-songwriter said even recording the track was a quick process, reported Female First.
"We wrote it in like half an hour. Iggy had like done her rap so I just came in the studio and put the chorus down so that was it, it was a really quick process," Charli said.
The "Boom Clap" hitmaker said the song changed her life as it made her meet a lot of new people.
"I think really behind the scenes, (more) than my life. It did change my life in the sense that, I was definitely exposed to a lot more people, you know I was writing with bigger artists, and I guess I just partied a lot more after 'Fancy', which was really cool.